Circular radiator



J. FROELICH. CIRCULAR mamon.

APPLICATION FILED IULY I6, 1919.

'Pawmdsepn 13,1921.

2 SHEET`S--SHEET 2- iris /Warneys y UNITED STATES PATENT OFFICE.

JOHN FROELIG, 0l' ST. PAUL, MINNESOTA., ASSIGNOR T0 LESLIE S. HACKNEY, 0F ST.

i PAUL, MINNESOTA.

cIncULAn RADIATOR.

Specification of Letters Patent.

Patented Sept. 13, 1921.

To allwhomztmay concern: y Be it known that I, J oHN FRoELIoH, a citizen of the United States, resident of St. Paul, county of Ramsey, State of Minnesota, have invented certainnew and useful Improvements in Circular Radiators, of which the following is a specification.

The object of my `invention is to provlde a watercooling radiator for internal combustion engines which will be simple and compact in construction and at the same time have avery large radiating surface.

A further object is to provide a radiator which `will stand the vibration to which a radiator for this purpose issubjected without danger ofleakage, a very decided ob njection to tractor radiatorsas usually constructed. y

A further object is to provide a radiator of a particularly convenient form for tractors where the crank shaftofthe motor lies cross- `wise `of the frame. In such case it is de- Figure 1 1s a vertical sectional View4 through a circular radiator embodying my invention,

Fig. 2 is an elevation of the receiving end of the radiator, with a portion of its end wall broken away to show the circulating tubes,

Fig. 3 is a similar View of the discharge end of the radiator.

In the drawing, 2 represents a suitable base, secured to the frame of the tractor or other machine on which the radiator is to be used, and formed integrally with said base are heads 3 and 3, preferably of casting.

The head 3 is provided with a water intake pipe 4 at the top leading `to a circulating chamber 5 and from this chamber the water `Hows through tubes 6 to a corresponding chamber 5 in the head 3, the tubes being of suitable length and supported intermediate to their ends and at the center by rings 7. The chamber 5 communicates with a chamber9 in the head 3, separated from the `from thence to the discharging head and chamber and out of the radiator, and thereby the water is compelled to follow a tortuous path and remain in the radiator for a considerable length of time. The heads are each provided with a peripheral flange 13 and the circulating tubes are mounted in plates `14 which are secured to the fianges I3. by suitable means, such as bolts l5. In manufacturing the radiator, the tubes are first mounted in the plates 14 and then the plates and heads are vbolted together. The heads have hubs I6 centrally arranged therein connected by spokes 17 with the outer portions ofthe heads and in these hubs bearing boxes 18 are mounted for a shaft 19. Upon this shaft on each side a fan hub 20 is arranged. A disk 20 is mounted on the hub 20 and supports the fan blades 20. This fan is of the multi-vane type, with both ends open and air is admitted through the openings in the headset both ends of the radiator and blown out between the cooling tubes, and thetubes are so mounted that the currents of air will be compelled to follow a zigzag course between them and contacting with the surfaces of the tubes, will cool the walls thereof and reduce the temperature of the water flowing through the tubes, and as the water is passed back and forth from one end of the radiator to the other, it is subjected to the cooling air currents for a considerable period of time, suiicient at least to keep the water at the desired temperature.

A radiator built in this way will not only be thoroughly practical and eiicient as a cooling means for the water circulating system, but will be extremely durable under the adverse conditions of operating a tractor, where vibration is .such that a radiator as ordinarily constructed will soon become racked and twisted to such an extent that it will leak and cannot be easily repaired or kept in good order. Furthermore, this raditer to flow back and forth through groups I have described this'liquid cooling radiator for use in connection with a tractor, but it will be understood that it is equally applicable in various ways where the rapid cooling of a liquid is desired, hence I do not confine myself to the particular use hereinbefore described.

I claim as my invention:

l. A water cooling radiator comprising heads, one having an intake pipe and the other a discharge pipe, a series of water circulating tubes connecting chambers prolvided in said heads and bafile walls pro- .v1ded 1n sa1d heads and separating said viding the chambers in each head into separate compartments and compelling the waof said tubes from one head to the other between said inlet and outlet pipes, and a blast fan encircled by said tubes for directingcurrents of air outwardly between them.

3. A water cooling radiator comprising ring-shaped `heads having intake and discharge pipes respectively, said heads having hubs and spokes connecting said hubs with the outer portions of said heads, said heads having water-circulating chambers formed therein, each divided into a plurality of compartments, circulating tubes connecting the opposite compartments of said chambers for conducting the water to be cooled back and forth from 011e head to the other, a centrally arranged partition supporting said tubes intermediate to said heads, a shaft journaled in said hubs and fans mounted on said shaft upon each side of said partition for establishing currents of air inwardly through the open ends of said heads and outwardly between said cireulatingtubes.

4. A water cooling radiator' for internal combustion engines cylindrical, substantially, in form, comprising heads and water circulating tubes between them, said heads having intake and discharge ports respectively, a cylindrical fan' arranged within said radiator and encircled by said tubes and having its longitudinal axis parallel substantially with said tubes, said heads having openings therein for admitting incoming currents of air to the'blades of said fan and said currents of airbeing forced outwardly by said blades around and between said tubes.

5. A liquid cooling radiator comprising heads at the ends of the radiator having liquid circulating chambers therein and intake and discharge pipes therefo a series of circulating tubes having their ends mounted respectively in said heads and communicating with said chambers, said chambers having means for directing the ow of the liquid back and forth through said tubes be` tween the opposite heads, and a cylindrical fan interposed between said heads and encircled bysaid circulating tubes, the revolution of said fan directing currents of air outwardly through and between said tubes.

In witness whereof, I have hereunto set my hand this 3d day of July, 1918.

JOHN FROELICH. 

